Turn-bridge gate



(N0 Medal.) 2 Sheets-Sheet 1.

J. OSTERTAG, Jr.

TURN BRIDGE GATE.

No. 300,326. Patented June 10, 1884.

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(No Madel.) 2 Sheets-Sheet 2.

J. OSTERTAG, Jr

- TURN BRIDGE GATE.

No. 300,326. Patented June 10, 1884.

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TURN-BRIDGE GATE.

SPECIFICATION forming part of Letters Patent No. 300,326, dated June 10,138%.

Application filed February 19, 1884. (X0 model.)

To all whom it may concern:

a citizen of the United States of America, re-

siding at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Turn Bridge Gates, ofwhich the following is a spccifica tion, reference being had therein tothe accompanying drawings.

My invention relates to an improved turir bridge gate. The object oftheinvention is to provide simple and effective means for operatinggates which are adapted to obstruct the ways leadingto turn-bridges whensaid bridges are open for the passage of boats, whereby the many seriousaccidents and consequent loss of life may be avoided; and to that endthe invention consists of the novel devices and combination of devicesaswill be described and claimed.

Reference will be made to the accompany- .ing drawings, in which Figurel is a front elevation of the abutment 5 Fig. 2, a bottom plan of partthereof; Fig. 3, a sectional view of the same and part of the bridge;and Fi 4, a view in detail, showing the locking mechanism.

Like letters refer to like parts in each view.

A represents one abutment, upon the ledge of which the rollers 13 aremounted, said rollers serving as a guide to the bridge 0, adownwardlyprojecting beam, D, of which rests upon said rollers when thebridge is closed. Upon the ledge of the abutment, but upon a higherplane than the rollers 13, is formed a frame-work, E, of masonry orother suitable.

material, in which a groove, a, is formed. In groove a two carriages, FF, are situated, said carriages being provided with rollers b, whichmove on suitable ledges in said groove, and each carriage being providedon its upper edge with a notch or recess, a. To the rear of groove c, ateach end thereof, there is situated a block, G, inclined at each end,and a similar block, H, is situated to the rear of said groove at aboutthe center of the abutment.

Fivoted to bridge 0, as shown in Fig. 3, is an arm, I, to the outer endof which rollers d are secured, while at a point below its inner end aspring, 0, is placed, whereby the outer end of said arm is alwaysdepressed unless acted upon, as will be described. Attached to the innerend of each carriage F F is a cord, f, each of which passes around apulley, g, situated at or about the center of the abutment, then arounda pulley, ii, situated slightly to the rear of said pulleys g, thencearound a pulley, i, one at each side of the abutment, and up to thelower corner of the gate J, to which each is secured. Gate J is mountedin grooved uprights hi, and to each of its upper corners is secured acord, j, which passes over a pulley, 7;, and to the lower end of each ofwhich is secured a weight, L.

To the rear or outer end of each carriage F F there is secured a cord,Z, which, after passing over a pulley, m hangs down at the side of theabutment, and to each cord 1 is secured a weight, M.

Attached tothe inner end of carriage F is a cord, n, which is passedunder carriage F, around pulley o, and is secured to the outer end ofsaid carriage F. A cord, p, which is secured to the inner end ofcarriage F, is likewise carried under carriage F, around pulley q, andsecured to the outer end of said carriage F.

Pivoted in a bracket, 1', on the under side of the bridge is an arm, N,to the center of which is secured a cord, s, which, after passing over apulley, t, is secured to the lower end of alever, O, which is placedwithin easy reach of the bridge-tender. In the abutment there is formeda notch, a, into which the free end of arm Nenters, to lock the bridgein position for the passage thereon of pedestrians or vehicles.

The operation of the device is as follows: When the bridge is inposition for the passage of vehicles, 860., the gate J occupies theposition shown in Fig. 3, and the carriages F F that shownin dottedlines of Fig. 1. One roller of arm I rests upon the horizontal portion.of block H, and the free end of arm N rests within the notch n. It beingdesired to open the bridge for the passage of boats or for otherreasons, the bridge-tender operates lever O to raise the arm X fromnotch u, and proceeds to revolve the bridge. As soon as the bridgecommences to revolve, one roller of arm I is. forced into the notch ofeither carriage F or F, it depending upon which direction the bridgetakes. Supposing, then, this arm has entered the notch ofcarriage F,said carriage is forced toward the side of the abutment, and through themedium of cord n, described as attached to the inner end of carriage Fand to the outer end of carriage F, said last-named carriage is forcedtoward the opposite side of the abutment, the weights M being soregulated as to assist in the easy movement of said carriages. As thesecarriages are thus forced toward opposite sides of the abutment, thegate is lowered through the medium of cords f, secured to the inner endof each carriage and to the bottom of the gate. The gate is thus lowereduntil the roller of arm I comes in contact with one of the inclinedblocks G, when said arm is forced from the notch of the carriage andsaid carriage released, the parts being so arranged with respect to oneanother that by that time the gate will be completely closed. If thebridge is revolved entirely around, the arm I, upon contacting with theopposite incline G, will be forced into the notch of carriage F and areverse movement of the parts be brought about, whereby the gate will beagain opened, the movement being continued until the arm comes incontact with incline H at the center of the abutment, whereby it isreleased from the carriage, the arm N at the same time reaching a pointwhere it can again be dropped into notch 10 to lock the bridge inposition.

What I claim is- 1.;The carriages F F, joined together by cords n p, andto gate J by cords f, in combination with said gate J, bridge C, and armI, pivoted to said bridge, as and for the purpose set forth.

2. The carriages F F, provided with weights M, and joined together andto gate J by suitable cords, in combination with gate J, provided withweights L, bridge 0, and arm I, pivoted to said bridge, as described.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN OSTERTAG, JR.

Witnesses:

M. J. CLAG-ETT, W. L. KLnwEn.

